slow SD write

[Mystery905]

Does anybody else have slow writes to an SD card?

I've got a Sandisk 128MB SD card.
To save a 30K Excel spreadsheet takes 3 - 4 'cycles' of the colorful wheel.

I've heard of similar performance problems on certain ROM versions for IPAQ 39xx series. I am hoping there is a ROM update in the works for the V35...

[Mystery905]

Does anybody else have slow writes to an SD card?

I've got a Sandisk 128MB SD card.
To save a 30K Excel spreadsheet takes 3 - 4 'cycles' of the colorful wheel.

I've heard of similar performance problems on certain ROM versions for IPAQ 39xx series. I am hoping there is a ROM update in the works for the V35...

[Mystery905]

It's not fault of the V35!

I tried the same SD card in an Ipaq 1910 and it is the same thing. Maybe I'll upgrade to a 256MB Lexar....

[Raptor]

I've heard that Sandisk cards are extremely slow. I'm using a Sandisk 64mb card. I plan to get a 256 sometime soon. It will not be a Sandisk, for sure.

[Mystery905]

It was the Sandisk card! I just bought a Lexar 256MB and the speed difference is unbelievable. Reading and more importantly writing is at LEAST 5 times faster if not more.....and how much battery power am I saving because of that!

I am NEVER going to buy Sandisk again. However I will sell one that I no longer need! :wink:

[Burnthings176]

if u want a fast writer, just go out and buy a usb writer, ther a lot faster and you dont need to use ur ppc at all, and ther like $20-$30

[Vric]

Same Thing Happened to me.

I got a Sandisk SD card (256mb) and it was really slow. I also got 2 data corruption in one day.

I got back the card and got a Lexar. Way faster and work fine for over 1 year

Even with a usb writer, The Sandisk will be really slow

[tanalasta]

Sorry, but the opinion is almost universal. The standard Sandisk SD card has extremely slow write speeds that are almost disgraceful. It has to do with the poor quality chipset they utilise.

[ChristopherTD]

I just swapped my Kingston 512MB SD Card for a Lexar 512MB "High Performance" SD Card and the difference is remarkable.

It is at least 3 or 4 times faster saving files to the Lexar, and it also seems a little bit quicker in reading.

Applications that save to SD are much snappier with the Lexar.

I am pleased!

[Menneisyys]

Originally Posted by tanalasta

Sorry, but the opinion is almost universal. The standard Sandisk SD card has extremely slow write speeds that are almost disgraceful. It has to do with the poor quality chipset they utilise.

That's not really true. In a hi-end PDA like the hx4700 or the Pocket Loox 720, they can be written to at 600 (hx4700) ... 900 (Pocket Loox 720) kbytes/s from inside Resco File Explorer. On a prev-generation decent PPC (e.g., the 2210), the data rates are similar. For comparison, SanDisk Ultra II and Belkin eFilm cards can be written with the two hi-end machine at about 1.7 Mbytes/s - a little more than 2 times more than with the SanDisk. So, it has ot thing to do with any "poor quality chipset".

It must be something to do with the way the given apps write to the SD card. For example, Kingston SD cards also have serious probs (skipping etc) that write to them at constant, say, 112 kbps (which is by far below the 500-700 kbytes/s they're capable of in a decent PDA).